Diaphragm-pump.



Patented Apr. l, I902.

w. F. BUNNELLS. DIAPHRAGM PUMP.

(Application filed Sept. 20. 1901.

(No Modeh) INVENTEIR WITNESSES UNiTnn STeTns PATENT Trier),-

IVILLIAM F. R'UNNELLS, OF NEWBURYPORT, MASSACHUSETTS.

DIAPHRAGWFPUMP.

SPECIFICATION forming part of Letters Patent No. 696,696, dated April 1, 1902. Application filed September 20, 1901. Serial No. 75,818. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM F. RUNNELLs, of Newburyport, in the county of Essex and State of Massachusetts, have invented certain new and usefullmprovements in Diaphragm Pumps, of which the following is a specification.

This invention relates to diaphragm-pumps; and its objects are to increase the strength and rigidity of such structures and to sim plify the same.

The means in which myinvention consists whereby such objects are attained I shall now proceed to set forth and claim.

Of the accompanying drawings, Figure 1 represents a vertical section of a diaphragmpump constructed in accordance with my invention. Fig. 2 represents a detail side elevation of the inlet-valve. Fig. 3 represents a similar detail of the plunger-beam. Fig. 4: represents a similar detail of the brake or opcrating-lever. Fig. 5 represents a similar detail of the outlet-valve. Fig. 6 represents a section of the plunger-beam on the line Z Z of Fig. 3. v

The same reference characters denote the same parts in all the figures.

The casing of the pump is made up of upper and lower parts I I, detachably secured together by bolts K K, passing through lugs L L, and the flexible diaphragm E has its edges confined between said upper and lower parts. Below the diaphragm is the suctionchamber S, having an inlet-aperture formed ina cylindrical flange V, which aperture is controlled by the inlet-valve D, having the packing-washer H. 7

Above and below the diaphragm E, respectively, are located plates or disks 0 and M, forming the body of the vertically-movable plunger and confining between them the diaphragm E, through which and the said upper and lower plates extends an outlet-aperture. The said aperture is controlled by a vertically-movable outlet-valve F, formed with suitable downwardly-projecting guiding-lugs and having a packing-washer G, normally resting on the valve-seat formed around the upper edge of the outlet-aperture.

The two plates 0 M are detachably secured together by bolts N N, passing through the two hollow uprights P P, which project upwardly from the upper plate 0 on opposite sides of the outlet aperture. At their upper ends these uprights are connected by the transverse plunger-beam or cross-head A, secured in place by the bolts N N. It will be noted that said plunger-beam is integrally formed with downwardly-projecting lugs T T, extending a considerable distance down each of the uprights P P" and formed to closely fit or conform to the inner side surfaces of said uprights. These lugs make extended bearings between the plunger-beam A and the uprights P P, which add to the strength, rigidity, and permanency of the plunger structure, while they also extend, as will be noted in Fig. 1, into sufiicient proximity to the outlet-valve F to form stops for the latter, which the valve may encounter-in its upward or opening movement, whereby said movement is limited, the location of the lower ends of the lugs being such that the guide-lugs of the valve are prevented from entirely leaving the outlet-aperture. The valve and plunger structure thus provided is superior in the qualities stated above of strength, rigidity, and permanency to prior pumps of this .character and also in simplicity, certainty of operation, and cheapness of manufacture.

B represents the operating-lever or brake pivoted upon a pin supported by suitable lugs on the rim of the upper part I of the pump-casing. The inner end of said lever engages the pivot or bearing member of the plunger-beam A, the engaging parts being of the form particularly shown in Figs. 4. and. 6, their bearing-surfaces being chilled to reduce wear. The lever B is formed with a lower bearing-lip B, projecting from its body portion, and an upper overhanging bearing-lip or guard-lip B projecting from said body portion.

I claim In a diaphragm-pump, the combination of the diaphragm and plunger, said structure formed with an outlet from the pump-chamber, the plunger including a plate attached to the diaphragm and provided with a plurality of uprights on opposite sides of the outlet, a detachable cross head or beam connected to the upper ends of said uprights and said valve being adapted to encounter said 1c integrally formed with a plurality of downlugs in its upward movement.

Wardly-projecting lugs conforming to the up- In testimony whereof I have affixed my sigrights and constituting elongated bearings nature in presence of two witnesses.

5 between said upri hts and the cross-head said lugs being als?) arranged to act as upper WILLIAM RUNNELLS' stops for the outlet-valve, and an outlet- Witnesses: V valve supported by the diaphragm and plun- HOWARD W. PACKER,

ger structure and controlling said outlet, the I OSCAR H. NELSON. 

